Click RNMotionManager.xcodeproj in the project navigator and go the Build Settings tab. Make sure 'All' is toggled on (instead of 'Basic'). Look for Header Search Paths and make sure it contains both $(SRCROOT)/../react-native/React and $(SRCROOT)/../../React - mark both as recursive.

Run your project (Cmd+R)

Setup trouble?

If you get stuck, take a look at Brent Vatne's blog. He was gracious enough to help out on this project, and his blog is my go to reference for this stuff.